I’ve noticed this on DVDs and BluRays but also with games on any console. I’ve rented a movie and the disk is riddled with scratches and I’m sure it’s not going to read, but it somehow does. However, sometimes it hitches. But playing it back on a different DVD player presents no issues at all. What’s happening here?
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The data on a CD is actually on the top part where the graphic is. It’s a very thin film that holds the data. The rest of the CD is the plastic disc part that gives the data something rigid to hold onto. Most likely, it’s the under plastic part that gets scratched up and not the data itself. Disc readers use light to read the data through the plastic. Sometimes it can read the data through scratches, sometimes it can’t. That’s why when people perform CD repair, it’s usually some kind of liquid resin that just fills in the scratch gaps so that the plastic part can be transparent again.
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